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<Title>XYChart.setTrimData</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1"><a href="XYChart.htm">XYChart</a>.<wbr>setTrimData</p>
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<p class="heading2a">Usage</p>
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public void setTrimData(int startPos [, int len ])
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<p class="heading2">Description</p>
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Uses only a subset of the data series to draw charts.<br><br>
In finance charts, "lead data" are commonly needed to plot technical indicators. For example, to show a 20-days moving average line for 30 days, one needs 50 days of data. It is because computing 20-days moving average requires 20 days of "lead data". The setTrimData method is a convenience method for trimming off these "lead data" so they will not appear on the chart.
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<p class="heading2">Arguments</p>
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<th width="19%">Argument</th><th width="19%">Default</th><th>Description</th>
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<td>startPos</td><td>(Mandatory)</td><td>The index for the first data position to use for plotting charts.</td></tr><tr><td>len</td><td>7fffffff</td><td>The length of the data points used for plotting charts.</td>
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<p class="heading2">Return Value</p>
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None
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